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<div id=Content><div class="CClass"><div class=CTopic id=MainTopic><h1 class=CTitle><a name="OpenLayers.Map"></a>OpenLayers.Map</h1><div class=CBody><p>Instances of OpenLayers.Map are interactive maps embedded in a web page.&nbsp; Create a new map with the <a href="#OpenLayers.Map.OpenLayers.Map" class=LConstructor id=link67 onMouseOver="ShowTip(event, 'tt65', 'link67')" onMouseOut="HideTip('tt65')">OpenLayers.Map</a> constructor.</p><p>On their own maps do not provide much functionality.&nbsp;  To extend a map it&rsquo;s necessary to add controls (<a href="Control-js.html#OpenLayers.Control" class=LClass id=link68 onMouseOver="ShowTip(event, 'tt1', 'link68')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>) and layers (<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>) to the map.</p><!--START_ND_SUMMARY--><div class=Summary><div class=STitle>Summary</div><div class=SBorder><table border=0 cellspacing=0 cellpadding=0 class=STable><tr class="SMain"><td class=SEntry><a href="#OpenLayers.Map" >OpenLayers.Map</a></td><td class=SDescription>Instances of OpenLayers.Map are interactive maps embedded in a web page. </td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Map.Constants" >Constants</a></td><td class=SDescription></td></tr><tr class="SConstant SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.Z_INDEX_BASE" >Z_INDEX_BASE</a></td><td class=SDescription>{Object} Base z-indexes for different classes of thing</td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Map.Properties" >Properties</a></td><td class=SDescription></td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.events" >events</a></td><td class=SDescription>{<a href="Events-js.html#OpenLayers.Events" class=LClass >OpenLayers.Events</a>}</td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.events" >events</a></td><td class=SDescription>{<a href="Events-js.html#OpenLayers.Events" class=LClass >OpenLayers.Events</a>} An events object that handles all events on the map</td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.allOverlays" >allOverlays</a></td><td class=SDescription>{Boolean} Allow the map to function with &ldquo;overlays&rdquo; only. </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.div" >div</a></td><td class=SDescription>{DOMElement|String} The element that contains the map (or an id for that element). </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.layers" >layers</a></td><td class=SDescription>{Array(<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>)} Ordered list of layers in the map</td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.controls" >controls</a></td><td class=SDescription>{Array(<a href="Control-js.html#OpenLayers.Control" class=LClass id=link1 onMouseOver="ShowTip(event, 'tt1', 'link1')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>)} List of controls associated with the map.</td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.baseLayer" >baseLayer</a></td><td class=SDescription>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>} The currently selected base layer. </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.options" >options</a></td><td class=SDescription>{Object} The options object passed to the class constructor. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.tileSize" >tileSize</a></td><td class=SDescription>{<a href="BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link2 onMouseOver="ShowTip(event, 'tt2', 'link2')" onMouseOut="HideTip('tt2')">OpenLayers.Size</a>} Set in the map options to override the default tile size for this map.</td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.projection" >projection</a></td><td class=SDescription>{String} Set in the map options to specify the default projection for layers added to this map. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.units" >units</a></td><td class=SDescription>{String} The map units. </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.resolutions" >resolutions</a></td><td class=SDescription>{Array(Float)} A list of map resolutions (map units per pixel) in descending order. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.maxResolution" >maxResolution</a></td><td class=SDescription>{Float} Required if you are not displaying the whole world on a tile with the size specified in <a href="#OpenLayers.Map.tileSize" class=LProperty id=link3 onMouseOver="ShowTip(event, 'tt3', 'link3')" onMouseOut="HideTip('tt3')">tileSize</a>.</td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.minResolution" >minResolution</a></td><td class=SDescription>{Float}</td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.maxScale" >maxScale</a></td><td class=SDescription>{Float}</td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.minScale" >minScale</a></td><td class=SDescription>{Float}</td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.maxExtent" >maxExtent</a></td><td class=SDescription>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top). </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.minExtent" >minExtent</a></td><td class=SDescription>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top). </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.restrictedExtent" >restrictedExtent</a></td><td class=SDescription>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top). </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.numZoomLevels" >numZoomLevels</a></td><td class=SDescription>{Integer} Number of zoom levels for the map. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.theme" >theme</a></td><td class=SDescription>{String} Relative path to a CSS file from which to load theme styles. </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.displayProjection" >displayProjection</a></td><td class=SDescription>{<a href="Projection-js.html#OpenLayers.Projection" class=LClass id=link4 onMouseOver="ShowTip(event, 'tt4', 'link4')" onMouseOut="HideTip('tt4')">OpenLayers.Projection</a>} Requires proj4js support for projections other than EPSG:4326 or EPSG:900913/EPSG:3857. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.fallThrough" >fallThrough</a></td><td class=SDescription>{Boolean} Should OpenLayers allow events on the map to fall through to other elements on the page, or should it swallow them?&nbsp; </td></tr><tr class="SProperty SIndent2"><td class=SEntry><a href="#OpenLayers.Map.eventListeners" >eventListeners</a></td><td class=SDescription>{Object} If set as an option at construction, the eventListeners object will be registered with <a href="Events-js.html#OpenLayers.Events.on" class=LFunction id=link5 onMouseOver="ShowTip(event, 'tt5', 'link5')" onMouseOut="HideTip('tt5')">OpenLayers.Events.on</a>. </td></tr><tr class="SProperty SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.panMethod" >panMethod</a></td><td class=SDescription>{Function} The Easing function to be used for tweening. </td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Map.Constructor" >Constructor</a></td><td class=SDescription></td></tr><tr class="SConstructor SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.OpenLayers.Map" >OpenLayers.Map</a></td><td class=SDescription>Constructor for a new OpenLayers.Map instance. </td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Map.Functions" >Functions</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getViewport" id=link6 onMouseOver="ShowTip(event, 'tt6', 'link6')" onMouseOut="HideTip('tt6')">getViewport</a></td><td class=SDescription>Get the DOMElement representing the view port.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.render" id=link7 onMouseOver="ShowTip(event, 'tt7', 'link7')" onMouseOut="HideTip('tt7')">render</a></td><td class=SDescription>Render the map to a specified container.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.destroy" id=link8 onMouseOver="ShowTip(event, 'tt8', 'link8')" onMouseOut="HideTip('tt8')">destroy</a></td><td class=SDescription>Destroy this map. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.setOptions" id=link9 onMouseOver="ShowTip(event, 'tt9', 'link9')" onMouseOut="HideTip('tt9')">setOptions</a></td><td class=SDescription>Change the map options</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getTileSize" id=link10 onMouseOver="ShowTip(event, 'tt10', 'link10')" onMouseOut="HideTip('tt10')">getTileSize</a></td><td class=SDescription>Get the tile size for the map</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getBy" id=link11 onMouseOver="ShowTip(event, 'tt11', 'link11')" onMouseOut="HideTip('tt11')">getBy</a></td><td class=SDescription>Get a list of objects given a property and a match item.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getLayersBy" id=link12 onMouseOver="ShowTip(event, 'tt12', 'link12')" onMouseOut="HideTip('tt12')">getLayersBy</a></td><td class=SDescription>Get a list of layers with properties matching the given criteria.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getLayersByName" id=link13 onMouseOver="ShowTip(event, 'tt13', 'link13')" onMouseOut="HideTip('tt13')">getLayersByName</a></td><td class=SDescription>Get a list of layers with names matching the given name.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getLayersByClass" id=link14 onMouseOver="ShowTip(event, 'tt14', 'link14')" onMouseOut="HideTip('tt14')">getLayersByClass</a></td><td class=SDescription>Get a list of layers of a given class (CLASS_NAME).</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getControlsBy" id=link15 onMouseOver="ShowTip(event, 'tt15', 'link15')" onMouseOut="HideTip('tt15')">getControlsBy</a></td><td class=SDescription>Get a list of controls with properties matching the given criteria.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getControlsByClass" id=link16 onMouseOver="ShowTip(event, 'tt16', 'link16')" onMouseOut="HideTip('tt16')">getControlsByClass</a></td><td class=SDescription>Get a list of controls of a given class (CLASS_NAME).</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getLayer" id=link17 onMouseOver="ShowTip(event, 'tt17', 'link17')" onMouseOut="HideTip('tt17')">getLayer</a></td><td class=SDescription>Get a layer based on its id</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.addLayer" id=link18 onMouseOver="ShowTip(event, 'tt18', 'link18')" onMouseOut="HideTip('tt18')">addLayer</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.addLayers" id=link19 onMouseOver="ShowTip(event, 'tt19', 'link19')" onMouseOut="HideTip('tt19')">addLayers</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.removeLayer" id=link20 onMouseOver="ShowTip(event, 'tt20', 'link20')" onMouseOut="HideTip('tt20')">removeLayer</a></td><td class=SDescription>Removes a layer from the map by removing its visual element (the layer.div property), then removing it from the map&rsquo;s internal list of layers, setting the layer&rsquo;s map property to null.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getNumLayers" id=link21 onMouseOver="ShowTip(event, 'tt21', 'link21')" onMouseOut="HideTip('tt21')">getNumLayers</a></td><td class=SDescription>{Int} The number of layers attached to the map.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getLayerIndex" id=link22 onMouseOver="ShowTip(event, 'tt22', 'link22')" onMouseOut="HideTip('tt22')">getLayerIndex</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.setLayerIndex" id=link23 onMouseOver="ShowTip(event, 'tt23', 'link23')" onMouseOut="HideTip('tt23')">setLayerIndex</a></td><td class=SDescription>Move the given layer to the specified (zero-based) index in the layer list, changing its z-index in the map display. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.raiseLayer" id=link24 onMouseOver="ShowTip(event, 'tt24', 'link24')" onMouseOut="HideTip('tt24')">raiseLayer</a></td><td class=SDescription>Change the index of the given layer by delta. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.setBaseLayer" id=link25 onMouseOver="ShowTip(event, 'tt25', 'link25')" onMouseOut="HideTip('tt25')">setBaseLayer</a></td><td class=SDescription>Allows user to specify one of the currently-loaded layers as the Map&rsquo;s new base layer.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.addControl" id=link26 onMouseOver="ShowTip(event, 'tt26', 'link26')" onMouseOut="HideTip('tt26')">addControl</a></td><td class=SDescription>Add the passed over control to the map. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.addControls" id=link27 onMouseOver="ShowTip(event, 'tt27', 'link27')" onMouseOut="HideTip('tt27')">addControls</a></td><td class=SDescription>Add all of the passed over controls to the map. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getControl" id=link28 onMouseOver="ShowTip(event, 'tt28', 'link28')" onMouseOut="HideTip('tt28')">getControl</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.removeControl" id=link29 onMouseOver="ShowTip(event, 'tt29', 'link29')" onMouseOut="HideTip('tt29')">removeControl</a></td><td class=SDescription>Remove a control from the map. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.addPopup" id=link30 onMouseOver="ShowTip(event, 'tt30', 'link30')" onMouseOut="HideTip('tt30')">addPopup</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.removePopup" id=link31 onMouseOver="ShowTip(event, 'tt31', 'link31')" onMouseOut="HideTip('tt31')">removePopup</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getSize" id=link32 onMouseOver="ShowTip(event, 'tt32', 'link32')" onMouseOut="HideTip('tt32')">getSize</a></td><td class=SDescription>{<a href="BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link33 onMouseOver="ShowTip(event, 'tt2', 'link33')" onMouseOut="HideTip('tt2')">OpenLayers.Size</a>} An <a href="BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link34 onMouseOver="ShowTip(event, 'tt2', 'link34')" onMouseOut="HideTip('tt2')">OpenLayers.Size</a> object that represents the size, in pixels, of the div into which OpenLayers has been loaded. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.updateSize" id=link35 onMouseOver="ShowTip(event, 'tt33', 'link35')" onMouseOut="HideTip('tt33')">updateSize</a></td><td class=SDescription>This function should be called by any external code which dynamically changes the size of the map div (because mozilla wont let us catch the &ldquo;onresize&rdquo; for an element)</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getCenter" id=link36 onMouseOver="ShowTip(event, 'tt34', 'link36')" onMouseOut="HideTip('tt34')">getCenter</a></td><td class=SDescription>{<a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link37 onMouseOver="ShowTip(event, 'tt35', 'link37')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>}</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getZoom" id=link38 onMouseOver="ShowTip(event, 'tt36', 'link38')" onMouseOut="HideTip('tt36')">getZoom</a></td><td class=SDescription>{Integer}</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.pan" id=link39 onMouseOver="ShowTip(event, 'tt37', 'link39')" onMouseOut="HideTip('tt37')">pan</a></td><td class=SDescription>Allows user to pan by a value of screen pixels</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.panTo" id=link40 onMouseOver="ShowTip(event, 'tt38', 'link40')" onMouseOut="HideTip('tt38')">panTo</a></td><td class=SDescription>Allows user to pan to a new lonlat If the new lonlat is in the current extent the map will slide smoothly</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.setCenter" id=link41 onMouseOver="ShowTip(event, 'tt39', 'link41')" onMouseOut="HideTip('tt39')">setCenter</a></td><td class=SDescription>Set the map center (and optionally, the zoom level).</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getProjection" id=link42 onMouseOver="ShowTip(event, 'tt40', 'link42')" onMouseOut="HideTip('tt40')">getProjection</a></td><td class=SDescription>This method returns a string representing the projection. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getProjectionObject" id=link43 onMouseOver="ShowTip(event, 'tt41', 'link43')" onMouseOut="HideTip('tt41')">getProjectionObject</a></td><td class=SDescription>Returns the projection obect from the baselayer.</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getMaxResolution" id=link44 onMouseOver="ShowTip(event, 'tt42', 'link44')" onMouseOut="HideTip('tt42')">getMaxResolution</a></td><td class=SDescription>{String} The Map&rsquo;s Maximum Resolution</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getMaxExtent" id=link45 onMouseOver="ShowTip(event, 'tt43', 'link45')" onMouseOut="HideTip('tt43')">getMaxExtent</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getNumZoomLevels" id=link46 onMouseOver="ShowTip(event, 'tt44', 'link46')" onMouseOut="HideTip('tt44')">getNumZoomLevels</a></td><td class=SDescription>{Integer} The total number of zoom levels that can be displayed by the current baseLayer.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getExtent" id=link47 onMouseOver="ShowTip(event, 'tt45', 'link47')" onMouseOut="HideTip('tt45')">getExtent</a></td><td class=SDescription>{<a href="BaseTypes/Bounds-js.html#OpenLayers.Bounds" class=LClass id=link48 onMouseOver="ShowTip(event, 'tt46', 'link48')" onMouseOut="HideTip('tt46')">OpenLayers.Bounds</a>} A Bounds object which represents the lon/lat bounds of the current viewPort. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getResolution" id=link49 onMouseOver="ShowTip(event, 'tt47', 'link49')" onMouseOut="HideTip('tt47')">getResolution</a></td><td class=SDescription>{Float} The current resolution of the map. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getUnits" id=link50 onMouseOver="ShowTip(event, 'tt48', 'link50')" onMouseOut="HideTip('tt48')">getUnits</a></td><td class=SDescription>{Float} The current units of the map. </td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getScale" id=link51 onMouseOver="ShowTip(event, 'tt49', 'link51')" onMouseOut="HideTip('tt49')">getScale</a></td><td class=SDescription>{Float} The current scale denominator of the map. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getZoomForExtent" id=link52 onMouseOver="ShowTip(event, 'tt50', 'link52')" onMouseOut="HideTip('tt50')">getZoomForExtent</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getResolutionForZoom" id=link53 onMouseOver="ShowTip(event, 'tt51', 'link53')" onMouseOut="HideTip('tt51')">getResolutionForZoom</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getZoomForResolution" id=link54 onMouseOver="ShowTip(event, 'tt52', 'link54')" onMouseOut="HideTip('tt52')">getZoomForResolution</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.zoomTo" id=link55 onMouseOver="ShowTip(event, 'tt53', 'link55')" onMouseOut="HideTip('tt53')">zoomTo</a></td><td class=SDescription>Zoom to a specific zoom level</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.zoomIn" id=link56 onMouseOver="ShowTip(event, 'tt54', 'link56')" onMouseOut="HideTip('tt54')">zoomIn</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.zoomOut" id=link57 onMouseOver="ShowTip(event, 'tt55', 'link57')" onMouseOut="HideTip('tt55')">zoomOut</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.zoomToExtent" id=link58 onMouseOver="ShowTip(event, 'tt56', 'link58')" onMouseOut="HideTip('tt56')">zoomToExtent</a></td><td class=SDescription>Zoom to the passed in bounds, recenter</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.zoomToMaxExtent" id=link59 onMouseOver="ShowTip(event, 'tt57', 'link59')" onMouseOut="HideTip('tt57')">zoomToMaxExtent</a></td><td class=SDescription>Zoom to the full extent and recenter.</td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.zoomToScale" id=link60 onMouseOver="ShowTip(event, 'tt58', 'link60')" onMouseOut="HideTip('tt58')">zoomToScale</a></td><td class=SDescription>Zoom to a specified scale</td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getViewPortPxFromLonLat" id=link61 onMouseOver="ShowTip(event, 'tt59', 'link61')" onMouseOut="HideTip('tt59')">getViewPortPxFromLonLat</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getLonLatFromPixel" id=link62 onMouseOver="ShowTip(event, 'tt60', 'link62')" onMouseOut="HideTip('tt60')">getLonLatFromPixel</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getPixelFromLonLat" id=link63 onMouseOver="ShowTip(event, 'tt61', 'link63')" onMouseOut="HideTip('tt61')">getPixelFromLonLat</a></td><td class=SDescription>Returns a pixel location given a map location. </td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getViewPortPxFromLayerPx" id=link64 onMouseOver="ShowTip(event, 'tt62', 'link64')" onMouseOut="HideTip('tt62')">getViewPortPxFromLayerPx</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2"><td class=SEntry><a href="#OpenLayers.Map.getLayerPxFromViewPortPx" id=link65 onMouseOver="ShowTip(event, 'tt63', 'link65')" onMouseOut="HideTip('tt63')">getLayerPxFromViewPortPx</a></td><td class=SDescription></td></tr><tr class="SFunction SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.getLayerPxFromLonLat" id=link66 onMouseOver="ShowTip(event, 'tt64', 'link66')" onMouseOut="HideTip('tt64')">getLayerPxFromLonLat</a></td><td class=SDescription></td></tr><tr class="SGroup SIndent1"><td class=SEntry><a href="#OpenLayers.Map.Constants" >Constants</a></td><td class=SDescription></td></tr><tr class="SConstant SIndent2 SMarked"><td class=SEntry><a href="#OpenLayers.Map.TILE_WIDTH" >TILE_WIDTH</a></td><td class=SDescription>{Integer} 256 Default tile width (unless otherwise specified)</td></tr><tr class="SConstant SIndent2"><td class=SEntry><a href="#OpenLayers.Map.TILE_HEIGHT" >TILE_HEIGHT</a></td><td class=SDescription>{Integer} 256 Default tile height (unless otherwise specified)</td></tr></table></div></div><!--END_ND_SUMMARY--></div></div></div>

<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.Constants"></a>Constants</h3></div></div>

<div class="CConstant"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.Z_INDEX_BASE"></a>Z_INDEX_BASE</h3><div class=CBody><p>{Object} Base z-indexes for different classes of thing</p></div></div></div>

<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.Properties"></a>Properties</h3></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.events"></a>events</h3><div class=CBody><p>{<a href="Events-js.html#OpenLayers.Events" class=LClass >OpenLayers.Events</a>}</p><h4 class=CHeading>Register a listener for a particular event with the following syntax</h4><blockquote><pre class="prettyprint">map.events.register(type, obj, listener);</pre></blockquote><p>Listeners will be called with a reference to an event object.&nbsp;  The properties of this event depends on exactly what happened.</p><h4 class=CHeading>All event objects have at least the following properties</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>object</td><td class=CDLDescription>{Object} A reference to map.events.object.</td></tr><tr><td class=CDLEntry>element</td><td class=CDLDescription>{DOMElement} A reference to map.events.element.</td></tr></table><h4 class=CHeading>Browser events have the following additional properties</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>xy</td><td class=CDLDescription>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link69 onMouseOver="ShowTip(event, 'tt66', 'link69')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>} The pixel location of the event (relative to the the map viewport).</td></tr></table><h4 class=CHeading>Supported map event types</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>preaddlayer</td><td class=CDLDescription>triggered before a layer has been added.&nbsp;  The event object will include a <b>layer</b> property that references the layer to be added.&nbsp; When a listener returns &ldquo;false&rdquo; the adding will be aborted.</td></tr><tr><td class=CDLEntry>addlayer</td><td class=CDLDescription>triggered after a layer has been added.&nbsp;  The event object will include a <b>layer</b> property that references the added layer.</td></tr><tr><td class=CDLEntry>preremovelayer</td><td class=CDLDescription>triggered before a layer has been removed.&nbsp; The event object will include a <b>layer</b> property that references the layer to be removed.&nbsp; When a listener returns &ldquo;false&rdquo; the removal will be aborted.</td></tr><tr><td class=CDLEntry>removelayer</td><td class=CDLDescription>triggered after a layer has been removed.&nbsp;  The event object will include a <b>layer</b> property that references the removed layer.</td></tr><tr><td class=CDLEntry>changelayer</td><td class=CDLDescription>triggered after a layer name change, order change, opacity change, params change, visibility change (due to resolution thresholds) or attribution change (due to extent change).&nbsp; Listeners will receive an event object with <b>layer</b> and <b>property</b> properties.&nbsp; The <b>layer</b> property will be a reference to the changed layer.&nbsp; The <b>property</b> property will be a key to the changed property (name, order, opacity, params, visibility or attribution).</td></tr><tr><td class=CDLEntry>movestart</td><td class=CDLDescription>triggered after the start of a drag, pan, or zoom</td></tr><tr><td class=CDLEntry>move</td><td class=CDLDescription>triggered after each drag, pan, or zoom</td></tr><tr><td class=CDLEntry>moveend</td><td class=CDLDescription>triggered after a drag, pan, or zoom completes</td></tr><tr><td class=CDLEntry>zoomend</td><td class=CDLDescription>triggered after a zoom completes</td></tr><tr><td class=CDLEntry>mouseover</td><td class=CDLDescription>triggered after mouseover the map</td></tr><tr><td class=CDLEntry>mouseout</td><td class=CDLDescription>triggered after mouseout the map</td></tr><tr><td class=CDLEntry>mousemove</td><td class=CDLDescription>triggered after mousemove the map</td></tr><tr><td class=CDLEntry>changebaselayer</td><td class=CDLDescription>triggered after the base layer changes</td></tr></table></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.events"></a>events</h3><div class=CBody><p>{<a href="Events-js.html#OpenLayers.Events" class=LClass >OpenLayers.Events</a>} An events object that handles all events on the map</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.allOverlays"></a>allOverlays</h3><div class=CBody><p>{Boolean} Allow the map to function with &ldquo;overlays&rdquo; only.&nbsp;  Defaults to false.&nbsp;  If true, the lowest layer in the draw order will act as the base layer.&nbsp;  In addition, if set to true, all layers will have isBaseLayer set to false when they are added to the map.</p><h4 class=CHeading>Note</h4><p>If you set map.allOverlays to true, then you <b>cannot</b> use map.setBaseLayer or layer.setIsBaseLayer.&nbsp;  With allOverlays true, the lowest layer in the draw layer is the base layer.&nbsp;  So, to change the base layer, use <a href="#OpenLayers.Map.setLayerIndex" class=LFunction id=link70 onMouseOver="ShowTip(event, 'tt23', 'link70')" onMouseOut="HideTip('tt23')">setLayerIndex</a> or <a href="#OpenLayers.Map.raiseLayer" class=LFunction id=link71 onMouseOver="ShowTip(event, 'tt24', 'link71')" onMouseOut="HideTip('tt24')">raiseLayer</a> to set the layer index to 0.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.div"></a>div</h3><div class=CBody><p>{DOMElement|String} The element that contains the map (or an id for that element).&nbsp;  If the <a href="#OpenLayers.Map.OpenLayers.Map" class=LConstructor id=link72 onMouseOver="ShowTip(event, 'tt65', 'link72')" onMouseOut="HideTip('tt65')">OpenLayers.Map</a> constructor is called with two arguments, this should be provided as the first argument.&nbsp; Alternatively, the map constructor can be called with the options object as the only argument.&nbsp;  In this case (one argument), a div property may or may not be provided.&nbsp;  If the div property is not provided, the map can be rendered to a container later using the <a href="#OpenLayers.Map.render" class=LFunction id=link73 onMouseOver="ShowTip(event, 'tt7', 'link73')" onMouseOut="HideTip('tt7')">render</a> method.</p><h4 class=CHeading>Note</h4><p>If you are calling <a href="#OpenLayers.Map.render" class=LFunction id=link74 onMouseOver="ShowTip(event, 'tt7', 'link74')" onMouseOut="HideTip('tt7')">render</a> after map construction, do not use <a href="#OpenLayers.Map.maxResolution" class=LProperty id=link75 onMouseOver="ShowTip(event, 'tt67', 'link75')" onMouseOut="HideTip('tt67')">maxResolution</a>  auto.&nbsp;  Instead, divide your <a href="#OpenLayers.Map.maxExtent" class=LProperty id=link76 onMouseOver="ShowTip(event, 'tt68', 'link76')" onMouseOut="HideTip('tt68')">maxExtent</a> by your maximum expected dimension.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.layers"></a>layers</h3><div class=CBody><p>{Array(<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>)} Ordered list of layers in the map</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.controls"></a>controls</h3><div class=CBody><p>{Array(<a href="Control-js.html#OpenLayers.Control" class=LClass id=link77 onMouseOver="ShowTip(event, 'tt1', 'link77')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>)} List of controls associated with the map.</p><p>If not provided in the map options at construction, the map will by default be given the following controls if present in the build:</p><ul><li><a href="Control/Navigation-js.html#OpenLayers.Control.Navigation" class=LClass id=link78 onMouseOver="ShowTip(event, 'tt69', 'link78')" onMouseOut="HideTip('tt69')">OpenLayers.Control.Navigation</a> or <a href="Control/TouchNavigation-js.html#OpenLayers.Control.TouchNavigation" class=LClass id=link79 onMouseOver="ShowTip(event, 'tt70', 'link79')" onMouseOut="HideTip('tt70')">OpenLayers.Control.TouchNavigation</a></li><li><a href="Control/Zoom-js.html#OpenLayers.Control.Zoom" class=LClass id=link80 onMouseOver="ShowTip(event, 'tt71', 'link80')" onMouseOut="HideTip('tt71')">OpenLayers.Control.Zoom</a> or <a href="Control/PanZoom-js.html#OpenLayers.Control.PanZoom" class=LClass id=link81 onMouseOver="ShowTip(event, 'tt72', 'link81')" onMouseOut="HideTip('tt72')">OpenLayers.Control.PanZoom</a></li><li><a href="Control/ArgParser-js.html#OpenLayers.Control.ArgParser" class=LClass id=link82 onMouseOver="ShowTip(event, 'tt73', 'link82')" onMouseOut="HideTip('tt73')">OpenLayers.Control.ArgParser</a></li><li><a href="Control/Attribution-js.html#OpenLayers.Control.Attribution" class=LClass id=link83 onMouseOver="ShowTip(event, 'tt74', 'link83')" onMouseOut="HideTip('tt74')">OpenLayers.Control.Attribution</a></li></ul></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.baseLayer"></a>baseLayer</h3><div class=CBody><p>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>} The currently selected base layer.&nbsp;  This determines min/max zoom level, projection, etc.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.options"></a>options</h3><div class=CBody><p>{Object} The options object passed to the class constructor.&nbsp; Read-only.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.tileSize"></a>tileSize</h3><div class=CBody><p>{<a href="BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link84 onMouseOver="ShowTip(event, 'tt2', 'link84')" onMouseOut="HideTip('tt2')">OpenLayers.Size</a>} Set in the map options to override the default tile size for this map.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.projection"></a>projection</h3><div class=CBody><p>{String} Set in the map options to specify the default projection for layers added to this map.&nbsp; When using a projection other than EPSG:4326 (CRS:84, Geographic) or EPSG:3857 (EPSG:900913, Web Mercator), also set maxExtent, maxResolution or resolutions.&nbsp;  Default is &ldquo;EPSG:4326&rdquo;.&nbsp; Note that the projection of the map is usually determined by that of the current baseLayer (see <a href="#OpenLayers.Map.baseLayer" class=LProperty id=link85 onMouseOver="ShowTip(event, 'tt75', 'link85')" onMouseOut="HideTip('tt75')">baseLayer</a> and <a href="#OpenLayers.Map.getProjectionObject" class=LFunction id=link86 onMouseOver="ShowTip(event, 'tt41', 'link86')" onMouseOut="HideTip('tt41')">getProjectionObject</a>).</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.units"></a>units</h3><div class=CBody><p>{String} The map units.&nbsp;  Possible values are &lsquo;degrees&rsquo; (or &lsquo;dd&rsquo;), &lsquo;m&rsquo;, &lsquo;ft&rsquo;, &lsquo;km&rsquo;, &lsquo;mi&rsquo;, &lsquo;inches&rsquo;.&nbsp;  Normally taken from the projection.&nbsp; Only required if both map and layers do not define a projection, or if they define a projection which does not define units</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.resolutions"></a>resolutions</h3><div class=CBody><p>{Array(Float)} A list of map resolutions (map units per pixel) in descending order.&nbsp;  If this is not set in the layer constructor, it will be set based on other resolution related properties (maxExtent, maxResolution, maxScale, etc.).</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.maxResolution"></a>maxResolution</h3><div class=CBody><p>{Float} Required if you are not displaying the whole world on a tile with the size specified in <a href="#OpenLayers.Map.tileSize" class=LProperty id=link87 onMouseOver="ShowTip(event, 'tt3', 'link87')" onMouseOut="HideTip('tt3')">tileSize</a>.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.minResolution"></a>minResolution</h3><div class=CBody><p>{Float}</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.maxScale"></a>maxScale</h3><div class=CBody><p>{Float}</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.minScale"></a>minScale</h3><div class=CBody><p>{Float}</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.maxExtent"></a>maxExtent</h3><div class=CBody><p>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top).&nbsp; The maximum extent for the map.&nbsp;  Defaults to the whole world in decimal degrees (-180, -90, 180, 90).&nbsp;  Specify a different extent in the map options if you are not using a geographic projection and displaying the whole  world.&nbsp; To restrict user panning and zooming of the map, use <a href="#OpenLayers.Map.restrictedExtent" class=LProperty id=link88 onMouseOver="ShowTip(event, 'tt76', 'link88')" onMouseOut="HideTip('tt76')">restrictedExtent</a> instead.&nbsp;  The value for <a href="#OpenLayers.Map.maxExtent" class=LProperty id=link89 onMouseOver="ShowTip(event, 'tt68', 'link89')" onMouseOut="HideTip('tt68')">maxExtent</a> will change calculations for tile URLs.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.minExtent"></a>minExtent</h3><div class=CBody><p>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top).&nbsp; The minimum extent for the map.&nbsp;  Defaults to null.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.restrictedExtent"></a>restrictedExtent</h3><div class=CBody><p>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top).&nbsp; Limit map navigation to this extent where possible.&nbsp; If a non-null restrictedExtent is set, panning will be restricted to the given bounds.&nbsp;  In addition, zooming to a resolution that displays more than the restricted extent will center the map on the restricted extent.&nbsp;  If you wish to limit the zoom level or resolution, use maxResolution.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.numZoomLevels"></a>numZoomLevels</h3><div class=CBody><p>{Integer} Number of zoom levels for the map.&nbsp;  Defaults to 16.&nbsp;  Set a different value in the map options if needed.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.theme"></a>theme</h3><div class=CBody><p>{String} Relative path to a CSS file from which to load theme styles.&nbsp; Specify null in the map options (e.g.&nbsp; {theme: null}) if you want to get cascading style declarations - by putting links to stylesheets or style declarations directly in your page.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.displayProjection"></a>displayProjection</h3><div class=CBody><p>{<a href="Projection-js.html#OpenLayers.Projection" class=LClass id=link90 onMouseOver="ShowTip(event, 'tt4', 'link90')" onMouseOut="HideTip('tt4')">OpenLayers.Projection</a>} Requires proj4js support for projections other than EPSG:4326 or EPSG:900913/EPSG:3857.&nbsp; Projection used by several controls to display data to user.&nbsp; If this property is set, it will be set on any control which has a null displayProjection property at the time the control is added to the map.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.fallThrough"></a>fallThrough</h3><div class=CBody><p>{Boolean} Should OpenLayers allow events on the map to fall through to other elements on the page, or should it swallow them?&nbsp; (#457) Default is to fall through.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.eventListeners"></a>eventListeners</h3><div class=CBody><p>{Object} If set as an option at construction, the eventListeners object will be registered with <a href="Events-js.html#OpenLayers.Events.on" class=LFunction id=link91 onMouseOver="ShowTip(event, 'tt5', 'link91')" onMouseOut="HideTip('tt5')">OpenLayers.Events.on</a>.&nbsp;  Object structure must be a listeners object as shown in the example for the events.on method.</p></div></div></div>

<div class="CProperty"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.panMethod"></a>panMethod</h3><div class=CBody><p>{Function} The Easing function to be used for tweening.&nbsp;  Default is OpenLayers.Easing.Expo.easeOut.&nbsp; Setting this to &lsquo;null&rsquo; turns off animated panning.</p></div></div></div>

<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.Constructor"></a>Constructor</h3></div></div>

<div class="CConstructor"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.OpenLayers.Map"></a>OpenLayers.Map</h3><div class=CBody><p>Constructor for a new OpenLayers.Map instance.&nbsp;  There are two possible ways to call the map constructor.&nbsp;  See the examples below.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>div</td><td class=CDLDescription>{DOMElement|String}  The element or id of an element in your page that will contain the map.&nbsp;  May be omitted if the <a href="#OpenLayers.Map.div" class=LProperty id=link92 onMouseOver="ShowTip(event, 'tt77', 'link92')" onMouseOut="HideTip('tt77')">div</a> option is provided or if you intend to call the <a href="#OpenLayers.Map.render" class=LFunction id=link93 onMouseOver="ShowTip(event, 'tt7', 'link93')" onMouseOut="HideTip('tt7')">render</a> method later.</td></tr><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object} Optional object with properties to tag onto the map.</td></tr></table><h4 class=CHeading>Valid options (in addition to the listed API properties)</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>center</td><td class=CDLDescription>{&lt;OpenLayers.LonLat&gt;|Array} The default initial center of the map.&nbsp; If provided as array, the first value is the x coordinate, and the 2nd value is the y coordinate.&nbsp; Only specify if <a href="#OpenLayers.Map.layers" class=LProperty id=link94 onMouseOver="ShowTip(event, 'tt78', 'link94')" onMouseOut="HideTip('tt78')">layers</a> is provided.&nbsp; Note that if an ArgParser/Permalink control is present, and the querystring contains coordinates, center will be set by that, and this option will be ignored.</td></tr><tr><td class=CDLEntry>zoom</td><td class=CDLDescription>{Number} The initial zoom level for the map.&nbsp; Only specify if <a href="#OpenLayers.Map.layers" class=LProperty id=link95 onMouseOver="ShowTip(event, 'tt78', 'link95')" onMouseOut="HideTip('tt78')">layers</a> is provided.&nbsp; Note that if an ArgParser/Permalink control is present, and the querystring contains a zoom level, zoom will be set by that, and this option will be ignored.</td></tr><tr><td class=CDLEntry>extent</td><td class=CDLDescription>{&lt;OpenLayers.Bounds&gt;|Array} The initial extent of the map.&nbsp; If provided as an array, the array should consist of four values (left, bottom, right, top).&nbsp; Only specify if &lt;center&gt; and &lt;zoom&gt; are not provided.</td></tr></table><h4 class=CHeading>Examples</h4><blockquote><pre class="prettyprint">// create a map with default options in an element with the id &quot;map1&quot;
var map = new OpenLayers.Map(&quot;map1&quot;);

// create a map with non-default options in an element with id &quot;map2&quot;
var options = {
    projection: &quot;EPSG:3857&quot;,
    maxExtent: new OpenLayers.Bounds(-200000, -200000, 200000, 200000),
    center: new OpenLayers.LonLat(-12356463.476333, 5621521.4854095)
};
var map = new OpenLayers.Map(&quot;map2&quot;, options);

// map with non-default options - same as above but with a single argument,
// a restricted extent, and using arrays for bounds and center
var map = new OpenLayers.Map({
    div: &quot;map_id&quot;,
    projection: &quot;EPSG:3857&quot;,
    maxExtent: [-18924313.432222, -15538711.094146, 18924313.432222, 15538711.094146],
    restrictedExtent: [-13358338.893333, -9608371.5085962, 13358338.893333, 9608371.5085962],
    center: [-12356463.476333, 5621521.4854095]
});

// create a map without a reference to a container - call render later
var map = new OpenLayers.Map({
    projection: &quot;EPSG:3857&quot;,
    maxExtent: new OpenLayers.Bounds(-200000, -200000, 200000, 200000)
});</pre></blockquote></div></div></div>

<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.Functions"></a>Functions</h3></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getViewport"></a>getViewport</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getViewport: function()</td></tr></table></blockquote><p>Get the DOMElement representing the view port.</p><h4 class=CHeading>Returns</h4><p>{DOMElement}</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.render"></a>render</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>render: function(</td><td class="PParameter  prettyprint " nowrap>div</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Render the map to a specified container.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>div</td><td class=CDLDescription>{String|DOMElement} The container that the map should be rendered to.&nbsp; If different than the current container, the map viewport will be moved from the current to the new container.</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.destroy"></a>destroy</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">destroy:function()</td></tr></table></blockquote><p>Destroy this map.&nbsp; Note that if you are using an application which removes a container of the map from the DOM, you need to ensure that you destroy the map <b>before</b> this happens; otherwise, the page unload handler will fail because the DOM elements that map.destroy() wants to clean up will be gone.&nbsp; <img mode="link" target="url target=&rdquo;http://trac.osgeo.org/openlayers/ticket/2277&rdquo; name=&rdquo;http://trac.osgeo.org/openlayers/ticket/2277&rdquo;> for more information&rdquo; original=&rdquo;(See <url target=&rdquo;http://trac.osgeo.org/openlayers/ticket/2277&rdquo; name=&rdquo;http://trac.osgeo.org/openlayers/ticket/2277&rdquo;> for more information)&rdquo;.&nbsp; This will apply to GeoExt and also to other applications which modify the DOM of the container of the OpenLayers Map.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.setOptions"></a>setOptions</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>setOptions: function(</td><td class="PParameter  prettyprint " nowrap>options</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Change the map options</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object} Hashtable of options to tag to the map</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getTileSize"></a>getTileSize</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getTileSize: function()</td></tr></table></blockquote><p>Get the tile size for the map</p><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link96 onMouseOver="ShowTip(event, 'tt2', 'link96')" onMouseOut="HideTip('tt2')">OpenLayers.Size</a>}</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getBy"></a>getBy</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getBy: function(</td><td class="PParameter  prettyprint " nowrap>array,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>property,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Get a list of objects given a property and a match item.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>array</td><td class=CDLDescription>{String} A property on the map whose value is an array.</td></tr><tr><td class=CDLEntry>property</td><td class=CDLDescription>{String} A property on each item of the given array.</td></tr><tr><td class=CDLEntry>match</td><td class=CDLDescription>{String | Object} A string to match.&nbsp;  Can also be a regular expression literal or object.&nbsp;  In addition, it can be any object with a method named test.&nbsp;  For reqular expressions or other, if match.test(map[array][i][property]) evaluates to true, the item will be included in the array returned.&nbsp;  If no items are found, an empty array is returned.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array} An array of items where the given property matches the given criteria.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getLayersBy"></a>getLayersBy</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayersBy: function(</td><td class="PParameter  prettyprint " nowrap>property,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Get a list of layers with properties matching the given criteria.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>property</td><td class=CDLDescription>{String} A layer property to be matched.</td></tr><tr><td class=CDLEntry>match</td><td class=CDLDescription>{String | Object} A string to match.&nbsp;  Can also be a regular expression literal or object.&nbsp;  In addition, it can be any object with a method named test.&nbsp;  For reqular expressions or other, if match.test(layer[property]) evaluates to true, the layer will be included in the array returned.&nbsp;  If no layers are found, an empty array is returned.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array(<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>)} A list of layers matching the given criteria.&nbsp; An empty array is returned if no matches are found.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getLayersByName"></a>getLayersByName</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayersByName: function(</td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Get a list of layers with names matching the given name.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>match</td><td class=CDLDescription>{String | Object} A layer name.&nbsp;  The name can also be a regular expression literal or object.&nbsp;  In addition, it can be any object with a method named test.&nbsp;  For reqular expressions or other, if name.test(layer.name) evaluates to true, the layer will be included in the list of layers returned.&nbsp;  If no layers are found, an empty array is returned.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array(<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>)} A list of layers matching the given name.&nbsp; An empty array is returned if no matches are found.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getLayersByClass"></a>getLayersByClass</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayersByClass: function(</td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Get a list of layers of a given class (CLASS_NAME).</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>match</td><td class=CDLDescription>{String | Object} A layer class name.&nbsp;  The match can also be a regular expression literal or object.&nbsp;  In addition, it can be any object with a method named test.&nbsp;  For reqular expressions or other, if type.test(layer.CLASS_NAME) evaluates to true, the layer will be included in the list of layers returned.&nbsp;  If no layers are found, an empty array is returned.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array(<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>)} A list of layers matching the given class.&nbsp; An empty array is returned if no matches are found.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getControlsBy"></a>getControlsBy</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getControlsBy: function(</td><td class="PParameter  prettyprint " nowrap>property,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Get a list of controls with properties matching the given criteria.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>property</td><td class=CDLDescription>{String} A control property to be matched.</td></tr><tr><td class=CDLEntry>match</td><td class=CDLDescription>{String | Object} A string to match.&nbsp;  Can also be a regular expression literal or object.&nbsp;  In addition, it can be any object with a method named test.&nbsp;  For reqular expressions or other, if match.test(layer[property]) evaluates to true, the layer will be included in the array returned.&nbsp;  If no layers are found, an empty array is returned.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array(<a href="Control-js.html#OpenLayers.Control" class=LClass id=link97 onMouseOver="ShowTip(event, 'tt1', 'link97')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>)} A list of controls matching the given criteria.&nbsp;  An empty array is returned if no matches are found.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getControlsByClass"></a>getControlsByClass</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getControlsByClass: function(</td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Get a list of controls of a given class (CLASS_NAME).</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>match</td><td class=CDLDescription>{String | Object} A control class name.&nbsp;  The match can also be a regular expression literal or object.&nbsp;  In addition, it can be any object with a method named test.&nbsp;  For reqular expressions or other, if type.test(control.CLASS_NAME) evaluates to true, the control will be included in the list of controls returned.&nbsp;  If no controls are found, an empty array is returned.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Array(<a href="Control-js.html#OpenLayers.Control" class=LClass id=link98 onMouseOver="ShowTip(event, 'tt1', 'link98')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>)} A list of controls matching the given class.&nbsp; An empty array is returned if no matches are found.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getLayer"></a>getLayer</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayer: function(</td><td class="PParameter  prettyprint " nowrap>id</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Get a layer based on its id</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>id</td><td class=CDLDescription>{String} A layer id</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>} The Layer with the corresponding id from the map&rsquo;s layer collection, or null if not found.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.addLayer"></a>addLayer</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addLayer: function (</td><td class="PParameter  prettyprint " nowrap>layer</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>layer</td><td class=CDLDescription>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>}</td></tr></table><h4 class=CHeading>Returns</h4><p>{Boolean} True if the layer has been added to the map.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.addLayers"></a>addLayers</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addLayers: function (</td><td class="PParameter  prettyprint " nowrap>layers</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>layers</td><td class=CDLDescription>{Array(<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>)}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.removeLayer"></a>removeLayer</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>removeLayer: function(</td><td class="PParameter  prettyprint " nowrap>layer,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>setNewBaseLayer</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Removes a layer from the map by removing its visual element (the layer.div property), then removing it from the map&rsquo;s internal list of layers, setting the layer&rsquo;s map property to null.</p><p>a &ldquo;removelayer&rdquo; event is triggered.</p><p>very worthy of mention is that simply removing a layer from a map will not cause the removal of any popups which may have been created by the layer. this is due to the fact that it was decided at some point that popups would not belong to layers. thus there is no way for us to know here to which layer the popup belongs.</p><p>A simple solution to this is simply to call destroy() on the layer. the default OpenLayers.Layer class&rsquo;s destroy() function automatically takes care to remove itself from whatever map it has been attached to.</p><p>The correct solution is for the layer itself to register an event-handler on &ldquo;removelayer&rdquo; and when it is called, if it recognizes itself as the layer being removed, then it cycles through its own personal list of popups, removing them from the map.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>layer</td><td class=CDLDescription>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>}</td></tr><tr><td class=CDLEntry>setNewBaseLayer</td><td class=CDLDescription>{Boolean} Default is true</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getNumLayers"></a>getNumLayers</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getNumLayers: function ()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{Int} The number of layers attached to the map.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getLayerIndex"></a>getLayerIndex</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayerIndex: function (</td><td class="PParameter  prettyprint " nowrap>layer</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>layer</td><td class=CDLDescription>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>}</td></tr></table><h4 class=CHeading>Returns</h4><p>{Integer} The current (zero-based) index of the given layer in the map&rsquo;s layer stack.&nbsp; Returns -1 if the layer isn&rsquo;t on the map.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.setLayerIndex"></a>setLayerIndex</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>setLayerIndex: function (</td><td class="PParameter  prettyprint " nowrap>layer,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>idx</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Move the given layer to the specified (zero-based) index in the layer list, changing its z-index in the map display.&nbsp; Use map.getLayerIndex() to find out the current index of a layer.&nbsp; Note that this cannot (or at least should not) be effectively used to raise base layers above overlays.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>layer</td><td class=CDLDescription>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>}</td></tr><tr><td class=CDLEntry>idx</td><td class=CDLDescription>{int}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.raiseLayer"></a>raiseLayer</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>raiseLayer: function (</td><td class="PParameter  prettyprint " nowrap>layer,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>delta</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Change the index of the given layer by delta.&nbsp; If delta is positive, the layer is moved up the map&rsquo;s layer stack; if delta is negative, the layer is moved down.&nbsp;  Again, note that this cannot (or at least should not) be effectively used to raise base layers above overlays.</p><h4 class=CHeading>Paremeters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>layer</td><td class=CDLDescription>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>}</td></tr><tr><td class=CDLEntry>delta</td><td class=CDLDescription>{int}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.setBaseLayer"></a>setBaseLayer</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>setBaseLayer: function(</td><td class="PParameter  prettyprint " nowrap>newBaseLayer</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Allows user to specify one of the currently-loaded layers as the Map&rsquo;s new base layer.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>newBaseLayer</td><td class=CDLDescription>{<a href="Layer-js.html#OpenLayers.Layer" class=LClass >OpenLayers.Layer</a>}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.addControl"></a>addControl</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addControl: function (</td><td class="PParameter  prettyprint " nowrap>control,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>px</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Add the passed over control to the map.&nbsp; Optionally position the control at the given pixel.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>control</td><td class=CDLDescription>{<a href="Control-js.html#OpenLayers.Control" class=LClass id=link99 onMouseOver="ShowTip(event, 'tt1', 'link99')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>}</td></tr><tr><td class=CDLEntry>px</td><td class=CDLDescription>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link100 onMouseOver="ShowTip(event, 'tt66', 'link100')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.addControls"></a>addControls</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addControls: function (</td><td class="PParameter  prettyprint " nowrap>controls,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>pixels</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Add all of the passed over controls to the map.&nbsp; You can pass over an optional second array with pixel-objects to position the controls.&nbsp; The indices of the two arrays should match and you can add null as pixel for those controls you want to be autopositioned.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>controls</td><td class=CDLDescription>{Array(<a href="Control-js.html#OpenLayers.Control" class=LClass id=link101 onMouseOver="ShowTip(event, 'tt1', 'link101')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>)}</td></tr><tr><td class=CDLEntry>pixels</td><td class=CDLDescription>{Array(<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link102 onMouseOver="ShowTip(event, 'tt66', 'link102')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>)}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getControl"></a>getControl</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getControl: function (</td><td class="PParameter  prettyprint " nowrap>id</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>id</td><td class=CDLDescription>{String} ID of the control to return.</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="Control-js.html#OpenLayers.Control" class=LClass id=link103 onMouseOver="ShowTip(event, 'tt1', 'link103')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>} The control from the map&rsquo;s list of controls which has a matching &lsquo;id&rsquo;.&nbsp; If none found, returns null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.removeControl"></a>removeControl</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>removeControl: function (</td><td class="PParameter  prettyprint " nowrap>control</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Remove a control from the map.&nbsp; Removes the control both from the map object&rsquo;s internal array of controls, as well as from the map&rsquo;s viewPort (assuming the control was not added outsideViewport)</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>control</td><td class=CDLDescription>{<a href="Control-js.html#OpenLayers.Control" class=LClass id=link104 onMouseOver="ShowTip(event, 'tt1', 'link104')" onMouseOut="HideTip('tt1')">OpenLayers.Control</a>} The control to remove.</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.addPopup"></a>addPopup</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addPopup: function(</td><td class="PParameter  prettyprint " nowrap>popup,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>exclusive</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>popup</td><td class=CDLDescription>{<a href="Popup-js.html#OpenLayers.Popup" class=LClass id=link105 onMouseOver="ShowTip(event, 'tt79', 'link105')" onMouseOut="HideTip('tt79')">OpenLayers.Popup</a>}</td></tr><tr><td class=CDLEntry>exclusive</td><td class=CDLDescription>{Boolean} If true, closes all other popups first</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.removePopup"></a>removePopup</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>removePopup: function(</td><td class="PParameter  prettyprint " nowrap>popup</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>popup</td><td class=CDLDescription>{<a href="Popup-js.html#OpenLayers.Popup" class=LClass id=link106 onMouseOver="ShowTip(event, 'tt79', 'link106')" onMouseOut="HideTip('tt79')">OpenLayers.Popup</a>}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getSize"></a>getSize</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getSize: function ()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link107 onMouseOver="ShowTip(event, 'tt2', 'link107')" onMouseOut="HideTip('tt2')">OpenLayers.Size</a>} An <a href="BaseTypes/Size-js.html#OpenLayers.Size" class=LClass id=link108 onMouseOver="ShowTip(event, 'tt2', 'link108')" onMouseOut="HideTip('tt2')">OpenLayers.Size</a> object that represents the size, in pixels, of the div into which OpenLayers has been loaded.&nbsp; Note - A clone() of this locally cached variable is returned, so as not to allow users to modify it.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.updateSize"></a>updateSize</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">updateSize: function()</td></tr></table></blockquote><p>This function should be called by any external code which dynamically changes the size of the map div (because mozilla wont let us catch the &ldquo;onresize&rdquo; for an element)</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getCenter"></a>getCenter</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getCenter: function ()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link109 onMouseOver="ShowTip(event, 'tt35', 'link109')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>}</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getZoom"></a>getZoom</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getZoom: function ()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{Integer}</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.pan"></a>pan</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>pan: function(</td><td class="PParameter  prettyprint " nowrap>dx,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>dy,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>options</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Allows user to pan by a value of screen pixels</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>dx</td><td class=CDLDescription>{Integer}</td></tr><tr><td class=CDLEntry>dy</td><td class=CDLDescription>{Integer}</td></tr><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object} Options to configure panning:</td></tr></table><ul><li><b>animate</b> {Boolean} Use panTo instead of setCenter.&nbsp; Default is true.</li><li><b>dragging</b> {Boolean} Call setCenter with dragging true.&nbsp;  Default is false.</li></ul></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.panTo"></a>panTo</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>panTo: function(</td><td class="PParameter  prettyprint " nowrap>lonlat</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Allows user to pan to a new lonlat If the new lonlat is in the current extent the map will slide smoothly</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>lonlat</td><td class=CDLDescription>{<a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link110 onMouseOver="ShowTip(event, 'tt35', 'link110')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.setCenter"></a>setCenter</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>setCenter: function(</td><td class="PParameter  prettyprint " nowrap>lonlat,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>zoom,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>dragging,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>forceZoomChange</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Set the map center (and optionally, the zoom level).</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>lonlat</td><td class=CDLDescription>{&lt;OpenLayers.LonLat&gt;|Array} The new center location.&nbsp; If provided as array, the first value is the x coordinate, and the 2nd value is the y coordinate.</td></tr><tr><td class=CDLEntry>zoom</td><td class=CDLDescription>{Integer} Optional zoom level.</td></tr><tr><td class=CDLEntry>dragging</td><td class=CDLDescription>{Boolean} Specifies whether or not to trigger movestart/end events</td></tr><tr><td class=CDLEntry>forceZoomChange</td><td class=CDLDescription>{Boolean} Specifies whether or not to trigger zoom change events (needed on baseLayer change)</td></tr></table><p>TBD: reconsider forceZoomChange in 3.0</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getProjection"></a>getProjection</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getProjection: function()</td></tr></table></blockquote><p>This method returns a string representing the projection.&nbsp; In the case of projection support, this will be the srsCode which is loaded -- otherwise it will simply be the string value that was passed to the projection at startup.</p><p>FIXME: In 3.0, we will remove getProjectionObject, and instead return a Projection object from this function.</p><h4 class=CHeading>Returns</h4><p>{String} The Projection string from the base layer or null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getProjectionObject"></a>getProjectionObject</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getProjectionObject: function()</td></tr></table></blockquote><p>Returns the projection obect from the baselayer.</p><h4 class=CHeading>Returns</h4><p>{<a href="Projection-js.html#OpenLayers.Projection" class=LClass id=link111 onMouseOver="ShowTip(event, 'tt4', 'link111')" onMouseOut="HideTip('tt4')">OpenLayers.Projection</a>} The Projection of the base layer.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getMaxResolution"></a>getMaxResolution</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getMaxResolution: function()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{String} The Map&rsquo;s Maximum Resolution</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getMaxExtent"></a>getMaxExtent</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getMaxExtent: function (</td><td class="PParameter  prettyprint " nowrap>options</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object}</td></tr></table><h4 class=CHeading>Allowed Options</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>restricted</td><td class=CDLDescription>{Boolean} If true, returns restricted extent (if it is available.)</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Bounds-js.html#OpenLayers.Bounds" class=LClass id=link112 onMouseOver="ShowTip(event, 'tt46', 'link112')" onMouseOut="HideTip('tt46')">OpenLayers.Bounds</a>} The maxExtent property as set on the current baselayer, unless the &lsquo;restricted&rsquo; option is set, in which case the &lsquo;restrictedExtent&rsquo; option from the map is returned (if it is set).</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getNumZoomLevels"></a>getNumZoomLevels</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getNumZoomLevels: function()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{Integer} The total number of zoom levels that can be displayed by the current baseLayer.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getExtent"></a>getExtent</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getExtent: function ()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Bounds-js.html#OpenLayers.Bounds" class=LClass id=link113 onMouseOver="ShowTip(event, 'tt46', 'link113')" onMouseOut="HideTip('tt46')">OpenLayers.Bounds</a>} A Bounds object which represents the lon/lat bounds of the current viewPort.&nbsp; If no baselayer is set, returns null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getResolution"></a>getResolution</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getResolution: function ()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{Float} The current resolution of the map.&nbsp; If no baselayer is set, returns null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getUnits"></a>getUnits</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getUnits: function ()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{Float} The current units of the map.&nbsp; If no baselayer is set, returns null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getScale"></a>getScale</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getScale: function ()</td></tr></table></blockquote><h4 class=CHeading>Returns</h4><p>{Float} The current scale denominator of the map.&nbsp; If no baselayer is set, returns null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getZoomForExtent"></a>getZoomForExtent</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getZoomForExtent: function (</td><td class="PParameter  prettyprint " nowrap>bounds,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>closest</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>bounds</td><td class=CDLDescription>{<a href="BaseTypes/Bounds-js.html#OpenLayers.Bounds" class=LClass id=link114 onMouseOver="ShowTip(event, 'tt46', 'link114')" onMouseOut="HideTip('tt46')">OpenLayers.Bounds</a>}</td></tr><tr><td class=CDLEntry>closest</td><td class=CDLDescription>{Boolean} Find the zoom level that most closely fits the specified bounds.&nbsp; Note that this may result in a zoom that does not exactly contain the entire extent.&nbsp; Default is false.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Integer} A suitable zoom level for the specified bounds.&nbsp; If no baselayer is set, returns null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getResolutionForZoom"></a>getResolutionForZoom</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getResolutionForZoom: function(</td><td class="PParameter  prettyprint " nowrap>zoom</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>zoom</td><td class=CDLDescription>{Float}</td></tr></table><h4 class=CHeading>Returns</h4><p>{Float} A suitable resolution for the specified zoom.&nbsp;  If no baselayer is set, returns null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getZoomForResolution"></a>getZoomForResolution</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getZoomForResolution: function(</td><td class="PParameter  prettyprint " nowrap>resolution,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>closest</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>resolution</td><td class=CDLDescription>{Float}</td></tr><tr><td class=CDLEntry>closest</td><td class=CDLDescription>{Boolean} Find the zoom level that corresponds to the absolute closest resolution, which may result in a zoom whose corresponding resolution is actually smaller than we would have desired (if this is being called from a getZoomForExtent() call, then this means that the returned zoom index might not actually contain the entire extent specified... but it&rsquo;ll be close).&nbsp; Default is false.</td></tr></table><h4 class=CHeading>Returns</h4><p>{Integer} A suitable zoom level for the specified resolution.&nbsp; If no baselayer is set, returns null.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.zoomTo"></a>zoomTo</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>zoomTo: function(</td><td class="PParameter  prettyprint " nowrap>zoom</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Zoom to a specific zoom level</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>zoom</td><td class=CDLDescription>{Integer}</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.zoomIn"></a>zoomIn</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">zoomIn: function()</td></tr></table></blockquote></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.zoomOut"></a>zoomOut</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">zoomOut: function()</td></tr></table></blockquote></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.zoomToExtent"></a>zoomToExtent</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>zoomToExtent: function(</td><td class="PParameter  prettyprint " nowrap>bounds,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>closest</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Zoom to the passed in bounds, recenter</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>bounds</td><td class=CDLDescription>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top).</td></tr><tr><td class=CDLEntry>closest</td><td class=CDLDescription>{Boolean} Find the zoom level that most closely fits the specified bounds.&nbsp; Note that this may result in a zoom that does not exactly contain the entire extent.&nbsp; Default is false.</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.zoomToMaxExtent"></a>zoomToMaxExtent</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>zoomToMaxExtent: function(</td><td class="PParameter  prettyprint " nowrap>options</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Zoom to the full extent and recenter.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>options</td><td class=CDLDescription>{Object}</td></tr></table><h4 class=CHeading>Allowed Options</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>restricted</td><td class=CDLDescription>{Boolean} True to zoom to restricted extent if it is set.&nbsp; Defaults to true.</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.zoomToScale"></a>zoomToScale</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>zoomToScale: function(</td><td class="PParameter  prettyprint " nowrap>scale,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>closest</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Zoom to a specified scale</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>scale</td><td class=CDLDescription>{float}</td></tr><tr><td class=CDLEntry>closest</td><td class=CDLDescription>{Boolean} Find the zoom level that most closely fits the specified scale.&nbsp; Note that this may result in a zoom that does not exactly contain the entire extent.&nbsp; Default is false.</td></tr></table></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getViewPortPxFromLonLat"></a>getViewPortPxFromLonLat</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getViewPortPxFromLonLat: function (</td><td class="PParameter  prettyprint " nowrap>lonlat</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>lonlat</td><td class=CDLDescription>{<a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link115 onMouseOver="ShowTip(event, 'tt35', 'link115')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>}</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link116 onMouseOver="ShowTip(event, 'tt66', 'link116')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>} An OpenLayers.Pixel which is the passed-in <a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link117 onMouseOver="ShowTip(event, 'tt35', 'link117')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>, translated into view port pixels by the current base layer.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getLonLatFromPixel"></a>getLonLatFromPixel</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLonLatFromPixel: function (</td><td class="PParameter  prettyprint " nowrap>px</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>px</td><td class=CDLDescription>{&lt;OpenLayers.Pixel&gt;|Object} An OpenLayers.Pixel or an object with a &lsquo;x&rsquo; and &lsquo;y&rsquo; properties.</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link118 onMouseOver="ShowTip(event, 'tt35', 'link118')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>} An OpenLayers.LonLat corresponding to the given OpenLayers.Pixel, translated into lon/lat by the current base layer</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getPixelFromLonLat"></a>getPixelFromLonLat</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getPixelFromLonLat: function (</td><td class="PParameter  prettyprint " nowrap>lonlat</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><p>Returns a pixel location given a map location.&nbsp;  The map location is translated to an integer pixel location (in viewport pixel coordinates) by the current base layer.</p><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>lonlat</td><td class=CDLDescription>{<a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link119 onMouseOver="ShowTip(event, 'tt35', 'link119')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>} A map location.</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link120 onMouseOver="ShowTip(event, 'tt66', 'link120')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>} An OpenLayers.Pixel corresponding to the <a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link121 onMouseOver="ShowTip(event, 'tt35', 'link121')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a> translated into view port pixels by the current base layer.</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getViewPortPxFromLayerPx"></a>getViewPortPxFromLayerPx</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getViewPortPxFromLayerPx:function(</td><td class="PParameter  prettyprint " nowrap>layerPx</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>layerPx</td><td class=CDLDescription>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link122 onMouseOver="ShowTip(event, 'tt66', 'link122')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>}</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link123 onMouseOver="ShowTip(event, 'tt66', 'link123')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>} Layer Pixel translated into ViewPort Pixel coordinates</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getLayerPxFromViewPortPx"></a>getLayerPxFromViewPortPx</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayerPxFromViewPortPx:function(</td><td class="PParameter  prettyprint " nowrap>viewPortPx</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>viewPortPx</td><td class=CDLDescription>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link124 onMouseOver="ShowTip(event, 'tt66', 'link124')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>}</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link125 onMouseOver="ShowTip(event, 'tt66', 'link125')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>} ViewPort Pixel translated into Layer Pixel coordinates</p></div></div></div>

<div class="CFunction"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.getLayerPxFromLonLat"></a>getLayerPxFromLonLat</h3><div class=CBody><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayerPxFromLonLat: function (</td><td class="PParameter  prettyprint " nowrap>lonlat</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote><h4 class=CHeading>Parameters</h4><table border=0 cellspacing=0 cellpadding=0 class=CDescriptionList><tr><td class=CDLEntry>lonlat</td><td class=CDLDescription>{<a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link126 onMouseOver="ShowTip(event, 'tt35', 'link126')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>} lonlat</td></tr></table><h4 class=CHeading>Returns</h4><p>{<a href="BaseTypes/Pixel-js.html#OpenLayers.Pixel" class=LClass id=link127 onMouseOver="ShowTip(event, 'tt66', 'link127')" onMouseOut="HideTip('tt66')">OpenLayers.Pixel</a>} An OpenLayers.Pixel which is the passed-in <a href="BaseTypes/LonLat-js.html#OpenLayers.LonLat" class=LClass id=link128 onMouseOver="ShowTip(event, 'tt35', 'link128')" onMouseOut="HideTip('tt35')">OpenLayers.LonLat</a>, translated into layer pixels by the current base layer</p></div></div></div>

<div class="CGroup"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.Constants"></a>Constants</h3></div></div>

<div class="CConstant"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.TILE_WIDTH"></a>TILE_WIDTH</h3><div class=CBody><p>{Integer} 256 Default tile width (unless otherwise specified)</p></div></div></div>

<div class="CConstant"><div class=CTopic><h3 class=CTitle><a name="OpenLayers.Map.TILE_HEIGHT"></a>TILE_HEIGHT</h3><div class=CBody><p>{Integer} 256 Default tile height (unless otherwise specified)</p></div></div></div>

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<!--START_ND_TOOLTIPS-->
<div class=CToolTip id="tt1"><div class=CClass>Controls affect the display or behavior of the map. </div></div><div class=CToolTip id="tt2"><div class=CClass>Instances of this class represent a width/height pair</div></div><div class=CToolTip id="tt3"><div class=CProperty>{OpenLayers.Size} Set in the map options to override the default tile size for this map.</div></div><div class=CToolTip id="tt4"><div class=CClass>Methods for coordinate transforms between coordinate systems. </div></div><div class=CToolTip id="tt5"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>on: function(</td><td class="PParameter  prettyprint " nowrap>object</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Convenience method for registering listeners with a common scope. </div></div><div class=CToolTip id="tt6"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getViewport: function()</td></tr></table></blockquote>Get the DOMElement representing the view port.</div></div><div class=CToolTip id="tt7"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>render: function(</td><td class="PParameter  prettyprint " nowrap>div</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Render the map to a specified container.</div></div><div class=CToolTip id="tt8"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">destroy:function()</td></tr></table></blockquote>Destroy this map. </div></div><div class=CToolTip id="tt9"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>setOptions: function(</td><td class="PParameter  prettyprint " nowrap>options</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Change the map options</div></div><div class=CToolTip id="tt10"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getTileSize: function()</td></tr></table></blockquote>Get the tile size for the map</div></div><div class=CToolTip id="tt11"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getBy: function(</td><td class="PParameter  prettyprint " nowrap>array,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>property,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Get a list of objects given a property and a match item.</div></div><div class=CToolTip id="tt12"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayersBy: function(</td><td class="PParameter  prettyprint " nowrap>property,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Get a list of layers with properties matching the given criteria.</div></div><div class=CToolTip id="tt13"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayersByName: function(</td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Get a list of layers with names matching the given name.</div></div><div class=CToolTip id="tt14"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayersByClass: function(</td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Get a list of layers of a given class (CLASS_NAME).</div></div><div class=CToolTip id="tt15"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getControlsBy: function(</td><td class="PParameter  prettyprint " nowrap>property,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Get a list of controls with properties matching the given criteria.</div></div><div class=CToolTip id="tt16"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getControlsByClass: function(</td><td class="PParameter  prettyprint " nowrap>match</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Get a list of controls of a given class (CLASS_NAME).</div></div><div class=CToolTip id="tt17"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayer: function(</td><td class="PParameter  prettyprint " nowrap>id</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Get a layer based on its id</div></div><div class=CToolTip id="tt18"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addLayer: function (</td><td class="PParameter  prettyprint " nowrap>layer</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt19"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addLayers: function (</td><td class="PParameter  prettyprint " nowrap>layers</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt20"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>removeLayer: function(</td><td class="PParameter  prettyprint " nowrap>layer,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>setNewBaseLayer</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Removes a layer from the map by removing its visual element (the layer.div property), then removing it from the map&rsquo;s internal list of layers, setting the layer&rsquo;s map property to null.</div></div><div class=CToolTip id="tt21"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getNumLayers: function ()</td></tr></table></blockquote>{Int} The number of layers attached to the map.</div></div><div class=CToolTip id="tt22"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayerIndex: function (</td><td class="PParameter  prettyprint " nowrap>layer</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt23"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>setLayerIndex: function (</td><td class="PParameter  prettyprint " nowrap>layer,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>idx</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Move the given layer to the specified (zero-based) index in the layer list, changing its z-index in the map display. </div></div><div class=CToolTip id="tt24"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>raiseLayer: function (</td><td class="PParameter  prettyprint " nowrap>layer,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>delta</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Change the index of the given layer by delta. </div></div><div class=CToolTip id="tt25"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>setBaseLayer: function(</td><td class="PParameter  prettyprint " nowrap>newBaseLayer</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Allows user to specify one of the currently-loaded layers as the Map&rsquo;s new base layer.</div></div><div class=CToolTip id="tt26"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addControl: function (</td><td class="PParameter  prettyprint " nowrap>control,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>px</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Add the passed over control to the map. </div></div><div class=CToolTip id="tt27"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addControls: function (</td><td class="PParameter  prettyprint " nowrap>controls,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>pixels</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Add all of the passed over controls to the map. </div></div><div class=CToolTip id="tt28"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getControl: function (</td><td class="PParameter  prettyprint " nowrap>id</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt29"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>removeControl: function (</td><td class="PParameter  prettyprint " nowrap>control</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Remove a control from the map. </div></div><div class=CToolTip id="tt30"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>addPopup: function(</td><td class="PParameter  prettyprint " nowrap>popup,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>exclusive</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt31"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>removePopup: function(</td><td class="PParameter  prettyprint " nowrap>popup</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt32"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getSize: function ()</td></tr></table></blockquote>{OpenLayers.Size} An OpenLayers.Size object that represents the size, in pixels, of the div into which OpenLayers has been loaded. </div></div><div class=CToolTip id="tt33"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">updateSize: function()</td></tr></table></blockquote>This function should be called by any external code which dynamically changes the size of the map div (because mozilla wont let us catch the &ldquo;onresize&rdquo; for an element)</div></div><div class=CToolTip id="tt34"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getCenter: function ()</td></tr></table></blockquote>{OpenLayers.LonLat}</div></div><div class=CToolTip id="tt35"><div class=CClass>This class represents a longitude and latitude pair</div></div><div class=CToolTip id="tt36"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getZoom: function ()</td></tr></table></blockquote>{Integer}</div></div><div class=CToolTip id="tt37"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>pan: function(</td><td class="PParameter  prettyprint " nowrap>dx,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>dy,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>options</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Allows user to pan by a value of screen pixels</div></div><div class=CToolTip id="tt38"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>panTo: function(</td><td class="PParameter  prettyprint " nowrap>lonlat</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Allows user to pan to a new lonlat If the new lonlat is in the current extent the map will slide smoothly</div></div><div class=CToolTip id="tt39"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>setCenter: function(</td><td class="PParameter  prettyprint " nowrap>lonlat,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>zoom,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>dragging,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>forceZoomChange</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Set the map center (and optionally, the zoom level).</div></div><div class=CToolTip id="tt40"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getProjection: function()</td></tr></table></blockquote>This method returns a string representing the projection. </div></div><div class=CToolTip id="tt41"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getProjectionObject: function()</td></tr></table></blockquote>Returns the projection obect from the baselayer.</div></div><div class=CToolTip id="tt42"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getMaxResolution: function()</td></tr></table></blockquote>{String} The Map&rsquo;s Maximum Resolution</div></div><div class=CToolTip id="tt43"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getMaxExtent: function (</td><td class="PParameter  prettyprint " nowrap>options</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt44"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getNumZoomLevels: function()</td></tr></table></blockquote>{Integer} The total number of zoom levels that can be displayed by the current baseLayer.</div></div><div class=CToolTip id="tt45"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getExtent: function ()</td></tr></table></blockquote>{OpenLayers.Bounds} A Bounds object which represents the lon/lat bounds of the current viewPort. </div></div><div class=CToolTip id="tt46"><div class=CClass>Instances of this class represent bounding boxes. </div></div><div class=CToolTip id="tt47"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getResolution: function ()</td></tr></table></blockquote>{Float} The current resolution of the map. </div></div><div class=CToolTip id="tt48"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getUnits: function ()</td></tr></table></blockquote>{Float} The current units of the map. </div></div><div class=CToolTip id="tt49"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">getScale: function ()</td></tr></table></blockquote>{Float} The current scale denominator of the map. </div></div><div class=CToolTip id="tt50"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getZoomForExtent: function (</td><td class="PParameter  prettyprint " nowrap>bounds,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>closest</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt51"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getResolutionForZoom: function(</td><td class="PParameter  prettyprint " nowrap>zoom</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt52"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getZoomForResolution: function(</td><td class="PParameter  prettyprint " nowrap>resolution,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>closest</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt53"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>zoomTo: function(</td><td class="PParameter  prettyprint " nowrap>zoom</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Zoom to a specific zoom level</div></div><div class=CToolTip id="tt54"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">zoomIn: function()</td></tr></table></blockquote></div></div><div class=CToolTip id="tt55"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td class="prettyprint">zoomOut: function()</td></tr></table></blockquote></div></div><div class=CToolTip id="tt56"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>zoomToExtent: function(</td><td class="PParameter  prettyprint " nowrap>bounds,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>closest</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Zoom to the passed in bounds, recenter</div></div><div class=CToolTip id="tt57"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>zoomToMaxExtent: function(</td><td class="PParameter  prettyprint " nowrap>options</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Zoom to the full extent and recenter.</div></div><div class=CToolTip id="tt58"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>zoomToScale: function(</td><td class="PParameter  prettyprint " nowrap>scale,</td></tr><tr><td></td><td class="PParameter  prettyprint " nowrap>closest</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Zoom to a specified scale</div></div><div class=CToolTip id="tt59"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getViewPortPxFromLonLat: function (</td><td class="PParameter  prettyprint " nowrap>lonlat</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt60"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLonLatFromPixel: function (</td><td class="PParameter  prettyprint " nowrap>px</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt61"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getPixelFromLonLat: function (</td><td class="PParameter  prettyprint " nowrap>lonlat</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote>Returns a pixel location given a map location. </div></div><div class=CToolTip id="tt62"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getViewPortPxFromLayerPx:function(</td><td class="PParameter  prettyprint " nowrap>layerPx</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt63"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayerPxFromViewPortPx:function(</td><td class="PParameter  prettyprint " nowrap>viewPortPx</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt64"><div class=CFunction><blockquote><table border=0 cellspacing=0 cellpadding=0 class="Prototype"><tr><td><table border=0 cellspacing=0 cellpadding=0><tr><td class="PBeforeParameters  prettyprint "nowrap>getLayerPxFromLonLat: function (</td><td class="PParameter  prettyprint " nowrap>lonlat</td><td class="PAfterParameters  prettyprint "nowrap>)</td></tr></table></td></tr></table></blockquote></div></div><div class=CToolTip id="tt65"><div class=CConstructor>Constructor for a new OpenLayers.Map instance. </div></div><div class=CToolTip id="tt66"><div class=CClass>This class represents a screen coordinate, in x and y coordinates</div></div><div class=CToolTip id="tt67"><div class=CProperty>{Float} Required if you are not displaying the whole world on a tile with the size specified in tileSize.</div></div><div class=CToolTip id="tt68"><div class=CProperty>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top). </div></div><div class=CToolTip id="tt69"><div class=CClass>The navigation control handles map browsing with mouse events (dragging, double-clicking, and scrolling the wheel). </div></div><div class=CToolTip id="tt70"><div class=CClass>The navigation control handles map browsing with touch events (dragging, double-tapping, tap with two fingers, and pinch zoom). </div></div><div class=CToolTip id="tt71"><div class=CClass>The Zoom control is a pair of +/- links for zooming in and out.</div></div><div class=CToolTip id="tt72"><div class=CClass>The PanZoom is a visible control, composed of a OpenLayers.Control.PanPanel and a OpenLayers.Control.ZoomPanel. </div></div><div class=CToolTip id="tt73"><div class=CClass>The ArgParser control adds location bar query string parsing functionality to an OpenLayers Map. </div></div><div class=CToolTip id="tt74"><div class=CClass>The attribution control adds attribution from layers to the map display. </div></div><div class=CToolTip id="tt75"><div class=CProperty>{OpenLayers.Layer} The currently selected base layer. </div></div><div class=CToolTip id="tt76"><div class=CProperty>{&lt;OpenLayers.Bounds&gt;|Array} If provided as an array, the array should consist of four values (left, bottom, right, top). </div></div><div class=CToolTip id="tt77"><div class=CProperty>{DOMElement|String} The element that contains the map (or an id for that element). </div></div><div class=CToolTip id="tt78"><div class=CProperty>{Array(OpenLayers.Layer)} Ordered list of layers in the map</div></div><div class=CToolTip id="tt79"><div class=CClass>A popup is a small div that can opened and closed on the map. </div></div><!--END_ND_TOOLTIPS-->




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